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Just as a 3D object can exist in a larger 3D space, yes, a 4D object can exist in a larger 4D space.Can a 4D object exist in a 4D space?
No, if I give you a cube with a volume of 1 cubic centimetre, a cube with a volume of 1 cubic metre will be sufficient to contain it. Similarly, to encompass a space-time continuum with finite 3-dimensional space, a space-time continuum with infinite 3-dimensional space can be used at every point in time (similarly, to encompass a space-time continuum whose time does not extend to infinity, a space-time continuum with infinite time can be used).So does a space containing a 4D object have to be 5D?
Yes if it meets our wiki standards for this, no if it doesn't. (i.e. no by default).For example, can a dimension that meets the requirements of L2C and contain more than one universe be 5D?